unsave_facebook_saved.js

(function () {

const intervalMiliseconds = 10;
const waitToLoadMiliseconds = 1000;

const getUnsaveA = () => document.querySelector('.uiContextualLayerPositioner:not(.hidden_elem) li:last-child a');
const scrollToBottom = () => window.scrollTo(0, document.body.scrollHeight);

const unsaveAndLoad = (recursive) => {

    const alpha = waitToLoadMiliseconds;
    const beta = intervalMiliseconds;
    
    const buttons = document.querySelectorAll('#saveContentFragment .clearfix [id^="saved-more-button"] button');

    var i = 1;
    Array.from(buttons).forEach(button => {
        if(button.offsetParent === null) return;
        setTimeout(() => button.click(), beta*i++);
        setTimeout(() => getUnsaveA().click(), beta*i++);
    });
    setTimeout(scrollToBottom, beta*i);

    if(recursive) setTimeout(() => unsaveAndLoad(true), beta*i+alpha);

};

if(confirm('Unsave?')) unsaveAndLoad(confirm('Unsave infinitely?'));

})();